Q: What is the sum of all factors of the number 387,855 excluding 387,855?

A: 402,705

Why is 402,705 the sum of all factors of 387,855, excluding 387,855?

The factors of the number 387,855 are: 1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 85, 117, 135, 153, 169, 195, 221, 255, 351, 459, 507, 585, 663, 765, 845, 1105, 1521, 1755, 1989, 2295, 2535, 2873, 3315, 4563, 5967, 7605, 8619, 9945, 14365, 22815, 25857, 29835, 43095, 77571, 129285, 387855.

If you add them up, you will get the total of 388,257. Now subtract 387,855 to get 402,705